！！！
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <form action="demo_form.php" method="post/get">
        <input type="text" name="email" size="40" maxlength="50">
        <input type="password">
        <input type="checkbox" checked="checked">
        <input type="radio" checked="checked">
        <input type="submit" value="Send">
        <input type="reset">
        <input type="hidden">
        <select> 
            <option>苹果</option> 
            <option selected="selected">香蕉</option> 
            <option>樱桃</option> 
        </select>
        <textarea name="comment" rows="6" cols="20">
        </textarea> </form>
</body>

</html>